Auto merge of #115691 - jsgf:typed-json-diags, r=est31,dtolnay

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Add `$message_type` field to distinguish json diagnostic outputs

Currently the json-formatted outputs have no way to unambiguously determine which kind of message is being output. A consumer can look for specific fields in the json object (eg "message"), but there's no guarantee that in future some other kind of output will have a field of the same name.

This PR adds a `"type"` field to add json outputs which can be used to unambiguously determine which kind of output it is. The mapping is:

`diagnostic`: regular compiler diagnostics
`artifact`: artifact notifications
`future_incompat`: Future incompatibility report
`unused_extern`: Unused crate warnings/errors

This matches the "internally tagged" representation for serde enums.

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bors 2023-11-21 06:30:14 +00:00

parent eb18e7adb1 ef23c03898

commit 0e88489c42

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